8 1/4 or 8 3/4 rear end

I have a 8.75 but it would need to be narrowed if you want to retain stock A body width. 489 case out of what I believe to be from a 71-73ish B-body. Im in Long Beach so I am not too far from you

Seems the B body rear is longer and would need to be narrowed quite a bit. Looking for something with less work need. How much were you asking for it if I had to go that route?

I know 8.75's for an A body are hard to come by, which seems ill need to lean towards an 8.25